Internal-combustion-engine valve.



A. 0. DADY. INTERNAL COMBUSTION ENGINE VALVE.

APPLICATION FILED JAN. 2. I918.

Patented Feb. 18, 1919.

UNITED STATES PATENT oFFIoE.

ARTHUR. O. DADY, OF NEW YORK, N. Y., ASSIG-NOR TO PFANSTIEHL COMPANY,INC.,

OF NORTH CHICAGO, ILLINOIS, A CORPORATION OF NEW YORK.

INTERNAL-COMBUSTION-ENGINE VALVE.

Specification of Letters Patent.

Application filed January 2, 1918. Serial No. 209,894.

' New York, in the county of New York and State of New York, haveinvented a certain new and useful Improvement in Internal-Combustion-Engine Valves, of which the' following is a full, clear,concise, and exact description, reference being had to the accompanyingdrawing, forming a .part of this specification. I

This invention relates to internal combustion engine valves, and isconcerned particularly wlth exhaust valves of the type which are cooledby the application of a cooling fluid to the inner wall 'thereof. Theobjects of the invention are to provide a valve of this type havingimproved means for forcing the cooling fluidtherethrough. -A furtherobject of the. invention is to provide means actuated by the movement ofthe valve itself for pumping the cooling fluid therethrough, and a stillfurther object is toprovide the Valve with means whereby the coolingfluid is taken from the water jacket surrounding the cylinder, forcedthrough the valve and returned to the water jacket. Other objects willappear as the description progresses, referenc e being had to theaccompanying drawing, in which I have illustrated in longitudinalsection a portion of a cylinder of an internal comustion engine equippedwith my improved valve. V

Referring to the drawing, the reference character 1 indicates the wallof a cylinder of. an internal combustion engine having a bore 2 and anexhaust chamber 3 communicating therewith.

The reference character 4 indicates a water jacket which may be of anydesired'construction or configuration. The exhaust chamher 3 is providedwith an exhaust port 5 having a valve seat 6 therein. An exhaust valvehaving a hollow head 7 and a hollow stem 8 co-acts withthe seat 6 toclose or open the exhaust chamber. The stem-of this valve slides in asleeve bearing 9, which .vent undue displacement of the valve.

into the valve stem 8 and is concentric therewith. The upper end of thetube opens into the hollow head 7 of the valve through the ports '15.The lower end of the valve stem 8 is closed by the tube 14 and theflange 16, which rests upon a shoulder formed upon the tube. The lowerend of the tube is enlarged at 17 as shown in the drawing, to form apump piston which reciprocates in a cylinder 18 formed in the waterjacket. The lower end of this cylinder is provided with an inlet port 19which is closed by a disk valve 20 having a stem 21, which extendsthrough the port 19 to prX cap 22, screw-threaded into the top of thecylinder head, provides means whereby the valve may be inserted orremoved.

Any desired means may be employed for giving the proper movement to theexhaust valve, as the details of this part of the struc- Patented Feb.18, 1919.

ture form no part of my present invention.

I have, however, illustrated a valve lever 23, which engages the lowersideof the collar 24 to raise the valve, the collar being situated asshown, between the lower end of the valve stem and the upper end of theenlarge ment 17. The collar 24 is provided with a flange 25 againstwhich the-lower end of the compression spring 26 seats. The upper end ofthe compression sprin against the lower side portion 0 the water jacket.

In operation, when the valve is suddenly lifted by the lever 23 water isdrawn into the lower end of the tube 14 through the port 19, and whenthe valve is returned by the spring 26, the lower end of the tube 14acts as a: piston to'force the water through the tube 14 into the hollowhead and out 26 abuts throu hthe ports 11, 12 and 13; It will 7 thereore be seen that I have provided means forming a part of the valvestructure for produclng a forced circulation of cooling fluid throughthe exhaust valve.

While I have described in'det'ail the preferred embodiment of myinvention, it is to be understood that it is capable of otheradaptations and modifications within the scope of the following claims.

Having thus described my'invention, what -I claim as new and desire tosecure by Letters Patent of the United States is:

1. In an internal combustion engine the combination with a cylinderhaving awater jacket and an exhaust port provided with a valve seat, ofa. tappet valve co-acting with said seat comprising a hollow head, ahollow stem communicating with said head and having-a port intermediatethe ends thereof registering with a port in said water jacket, andpumping means for forcing water through said valve, comprising a tubearranged within said valve, one end of said tube discharging into saidvalve head, a cylinder formed in said water jacket for receiving theother end of said tube, a port in said water jacket communicating withsaid cylinder, and means for-reciprocating said valve.

2. In aninternal combustion engine the combination with acylinder havinga water jacket and a port provided with a valve seat,

of a valve co-acting with said seat comprising a hollow head, .a hollowstem communieating with said head and having a port 1ntermediate theends thereof registering with a port in said water jacket, and pumpingmeans for forcing water through said valve, comprising a tube arrangedwithin said valve, one end of said tube discharging into said valvehead, a cylinder formed in said water jacket for receiving the other endof said tube, a port in said water jacket communicating with saidcylinder, and means for reciprocating said valve.

3. In an internal combustion. engine the combination with a cylinderh'avinga water 7 cating with said head and having a port regnaeeawistering with a port in said water jacket, and pumping means for forcingwater through said valve, comprising a tube discharging into said valve,a cylinder formed in said water jacket for receiving the other end ofsaid tube, a port "in said water jacket communicating with saidcylinder, and means for reciprocating said valve.

4. In an internal combustion engine the combination with a cylinderhaving a water jacket and a port provided with a valve seat, of a valveco-acting with said seat comprising a hollow head, a hollow stemcommunicating with said head and having a port reglstering'with a portin said water jacket, and pumping means for forcing water through saidvalve, comprising a tube discharging into said valve, a cylinder forreceiving the other end of said tube, means for establishingcommunications between said cylinder and said water jacket, and meansfor reciprocating said valve.

5. In an internal combustion engine the combination with a cylinderhaving a valve seat, of a valve co-acting with said seatvcomprising ahollow stem closed at its upper end and means for forcing fluid throughsaid stem comprising one element of a pump secured thereto, a secondpump element coacting with said first-named element, and means forreciprocating said valve.

In witness whereof, I hereunto subscribe my name this 21st day ofDecember, 1917.

ARTHUR 0; DADY.

Witnesses:

J. E. Lowe, V. A. Dana.

